How does a 300watt power supply power a 400watt minimum video card?

I have a 300watt LiteOn power supply. Model PS-6301-08A. I’m currently using an Nvidia GeForce 9500 GT 512MB. The minimum requirement to run this card is 400 watts. I’ve been using this card for more than a year and had no problems. I was just wondering how my power supply manages that. And if i upgrade to another video card with the same requirements, will it be able to power it?

5 Responses to “How does a 300watt power supply power a 400watt minimum video card?”

  1. Dave Blar  on July 31st, 2013

    um its probably fried that psu and i would defenitly upgrade. Ive never tried putting a gpu with a psu that cant handle it. i wouldnt risk it you can get a 850 watt for 80 bucks then youll be set for a while.

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  2. dave  on July 31st, 2013

    A graphics card will only pull as much as it needs at any given time. In order to max out the power usage youd have to be playing a high graphics video game. If it ran out of power, the computer should either experience artifacts or will just shutoff.

    However, I never heard of a graphics card that actually pulls 400 watts. Perhaps thats just what they recommend for the sake of adding a cushion of extra wattage.

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  3. realshadow17  on July 31st, 2013

    Some PSU are actually rated more than what the label says. http://kzkomputers.com/

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  4. Brandon  on July 31st, 2013

    Its has a recommended 350W power supply. The Graphics Card itself doesn’t use that much power, but the recommended amount that listed is 350 because its taking into account all the other stuff in your computer that is running. (CPU, Hard Drive, Disc Drive, ETC)

    So if the rest of your computer’s parts don’t use much energy then there is more left for the graphics card and that is probably why it is able to run for you. Keep in mind for the future though that it is always a good idea that your PSU meets the recommended power requirements for the graphics card you want to get.

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  5. Frostfire  on July 31st, 2013

    The lifespan of that PSU and video card, are truncated severely. You are in danger of burning out not just the PSU,but the whole computer. If the video card requires 400W, add 200W to the total. ie.600W

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